Amir Hadar wrote:
>> I'me tring to create a factory function that create a class as follow:
>> def CreatePreviewFrame(*addins):
> class tmp(cPreviewFrame,*addins):
> pass
> return tmp
It would seem the problem merely lies in the incorrect construction
of the "tmp" class. You have written this definition:
class tmp(cPreviewFrame, *addins):
as though it were a function call, which it is not. It's a
statement, introduced by the "class" keyword, which happens
to use parentheses to help with the syntax. The *addins
does not get expanded in this case and the compiler reports
a syntax error. Perhaps this should be added to the language,
but so far it has not been.
Note that your other experiment with (1, 2, *(3, 4)) is also
not currently supported, again because there's no function call
involved, with the associated expansion of the tuple into a
list of arguments. Again, no technical reason it couldn't
be added to the language (well, not a major one, I believe)
and it has been discussed before as a possibly desirable change
(meaning nobody has tried to submit a patch yet ;-), but
it is not currently supported.
Maybe this is a rare case where you'll need to use exec to
get the job done right.
-Peter